Parity is a way of life in the NFL. Every season there will be would-be contenders who turn out to be pretenders and vice versa. Because of the parity around the league, though, teams are also able to make quick turnarounds from one year to the next.

Editor's note: Former 49ers Pro Bowl quarterback Jeff Garcia, now an NBC Sports Bay Area analyst, shares his thoughts on the team each week throughout the season. This week, he takes look at how the 49ers have pulled off back-to-back upsets at this...